From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 30CE5CA5FAD for ; Tue, 29 Sep 2026 10:37:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:CC:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=AqOrdf3B364RLPq7aJIhgxV5z7+Zw/lE9opIsMCbaQE=; b=1RWqQglH2Co2sa5qeWzqBHzgct ULxuJQMZMR0KgQJTeKEuu7njzkgGkahI2UqoiNbVHJxCnywYB4LrByeKSuSR0EcpjPD2tX/DzNqkz csuBqQbZdi8P5AI6VnGep+0fk+PCToMMnXI+QOVOV88mzxNtsROKjbXRmcctUfWVi9jcHomxOjtBM 1P0zf2aVuvGZQpRypHGM1teUHH90oPFM+/IvadoUAc9mbC3bdEHMFsEj5EmsyhNVsr5LeoFGW2BdA zDfYu3CJ43ktSCeVYMrQnTMUMKu8oDT5IGYJ4g0bjD9J0E1tVQAr4rBALwQE9aSgygWyvtU/iHJXR RkyZtw4g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xBVCu-00000003GUZ-3tl1; Tue, 29 Sep 2026 10:37:08 +0000 Received: from canpmsgout07.his.huawei.com ([113.46.200.222]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1xBVCr-00000003GQc-2Eu7 for linux-arm-kernel@lists.infradead.org; Tue, 29 Sep 2026 10:37:07 +0000 dkim-signature: v=1; a=rsa-sha256; d=huawei.com; s=dkim; c=relaxed/relaxed; q=dns/txt; h=From; bh=AqOrdf3B364RLPq7aJIhgxV5z7+Zw/lE9opIsMCbaQE=; b=JDDJTsEgq7j1ogpi6CtZ7QCzXgQd1nj+Hx570qFh5Jhm0xN0BDjBZDNAiV4O3HSLfDqlGLET1 MLC98FNAAdq5h3fiJu49Xi6+REzDSIqIe0KJeseYLy6kjLUHTQM9DixTBaNLgNvXWZD7Fba4bil /jyuR0D+XHpvUbz7+eHX0QI= Received: from mail.maildlp.com (unknown [172.19.163.214]) by canpmsgout07.his.huawei.com (SkyGuard) with ESMTPS id 4hvDnZ4NkPzLlXB; Tue, 29 Sep 2026 18:24:50 +0800 (CST) Received: from kwepemr100010.china.huawei.com (unknown [7.202.195.125]) by mail.maildlp.com (Postfix) with ESMTPS id B64324056C; Tue, 29 Sep 2026 18:36:59 +0800 (CST) Received: from huawei.com (10.50.163.32) by kwepemr100010.china.huawei.com (7.202.195.125) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.45; Tue, 29 Sep 2026 18:36:58 +0800 From: Tian Zheng To: , , , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v5 04/15] KVM: arm64: Add KVM_REQ_RELOAD_STAGE2 Date: Tue, 29 Sep 2026 18:36:44 +0800 Message-ID: <20260929103655.85107-5-zhengtian10@huawei.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20260929103655.85107-1-zhengtian10@huawei.com> References: <20260929103655.85107-1-zhengtian10@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.50.163.32] X-ClientProxiedBy: kwepems500002.china.huawei.com (7.221.188.17) To kwepemr100010.china.huawei.com (7.202.195.125) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260929_033705_904874_579E4F18 X-CRM114-Status: GOOD ( 12.27 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Leonardo Bras Add a vcpu request to exit the guest, reload stage-2, and come back to the guest. This will be used by subsequent patches that enable S2 HAFDBS and HDBSS, as they may need to change VTCR bits for enabling/disabling the feature when the vcpus are still running. Link: https://lore.kernel.org/all/20260901171558.2674031-5-leo.bras@arm.com/ Signed-off-by: Leonardo Bras [zhengtian: reword the commit message] Signed-off-by: Tian Zheng --- arch/arm64/include/asm/kvm_host.h | 2 ++ arch/arm64/kvm/arm.c | 8 ++++++++ 2 files changed, 10 insertions(+) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index cd9b9d2462f9..86a4d6e50934 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -55,6 +55,8 @@ #define KVM_REQ_GUEST_HYP_IRQ_PENDING KVM_ARCH_REQ(9) #define KVM_REQ_MAP_L1_VNCR_EL2 KVM_ARCH_REQ(10) #define KVM_REQ_VGIC_PROCESS_UPDATE KVM_ARCH_REQ(11) +#define KVM_REQ_RELOAD_STAGE2 \ + KVM_ARCH_REQ_FLAGS(12, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) #define KVM_DIRTY_LOG_MANUAL_CAPS (KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE | \ KVM_DIRTY_LOG_INITIALLY_SET) diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 0576c2022ef5..d9ad765943d9 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -1175,6 +1175,14 @@ static int check_vcpu_requests(struct kvm_vcpu *vcpu) if (kvm_dirty_ring_check_request(vcpu)) return 0; + if (kvm_check_request(KVM_REQ_RELOAD_STAGE2, vcpu)) { + unsigned long flags; + + local_irq_save(flags); + __load_stage2(vcpu->arch.hw_mmu); + local_irq_restore(flags); + } + check_nested_vcpu_requests(vcpu); } -- 2.43.0